Pneumatic motor for use in automatic musical players.



P-ATENTED OCT. 29. 1907.

no. 86mm.

- P. BRAND. PNEUMATIC MOTOR FOR USE IN AUT-OMATIG MUSICAL PLAYERS.

APPLICATION FILED HA3. 4, 1907.

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-NO- 869,414. PATENTBD 0017.29. 190?.

e. P. BRAND. PNEUMATIC-MOTOR FOR USE IN AUTOMATIC MUSICAL PLAYERS.

APPLIOATION FILED MAE. 4, 1907.

2 SHEETS-8IIBET 2.

UNITED STATES PATENT OFFICE.

GEORGE P. BRAND, OF NEW YORK, N. Y.

PNEUMATIC moroaron USE IN AUTOMATIC MUSICAL-PLAYERS;

Specification of Letters atentQ Patented Oct. 29, 1907,

Application filed March 4, 1907; Serial No. 666,414.

, To all whom it may concern:

Be it known that I, GEORGE P; B'nnnlo, a citizen of j'gthe UnitedStates. residing in the city'oi New York,

b rough of Bronx, county and State of New York, have nvented' certainnew and useful Improvements in Pneumatic l\iotors for use in AutomaticMusical Players,' of which the following is a specification.

My'improvements relate to pneumatic motors actuated primarily by thewithdrawal of airtherefrom by reason of their connection indirectly byvalve controlled ports with tension or exhaust mechanism, the

device being applicable to the feeding of music sheets to the trackerbar of automatic players, or for analogous uses. inwhich a light,compact, easy running motor is desirable.

My invention is designed to effect a reduction in the stroke of thevalves, to render their thrustmore direct and in substantial alinementtherewith,- and to provide for the accurate adjustment of the valveswith relation to the ports,-avdistinguishing feature of the constructionbeing the introduction of an intermef diate reducing and centralizinglever and wrist connection between each crank pitman and its valvesubstantially as hereinafter set forth, whereby all lateral strain onthe valves is practically eliminated and the frictional resistancereduced to the minimum.

' suitable'conduit I), either directly or indirectly with exhaust.mechanism in any suitable or well known manner. To the back of the portblock B are connected a plurality of pneumatics, preferably four innumber, A, A AKA, in the drawings.

The pneumatics A, 1U, A, Afl-communicate respectiv'ely through ports a,a ,-a*, a, with the chambers b, I b'-, b, bflin the port block B. Thecentral ports b in theivalve seats b open into-the exhaust passage b,-the upper ports (1 into the chambers b, bf, and the.

lower ports b into the chambers b'-', b.. Thus the reciprocation oi t-llevalves V- puts each pneumatic alternately in communication withthe-exhaust passage b.' I Mounted in suitable bearings d,- d, on fixedparts; as

'-'o ii brackets d,. d, secured to the stationary members of thepneumatics A, and A, is a crank shaft 0 formed with cranks c," withwhich engage driving rods c piv- I otally connected with the-movablemembers of th.

pne'rima'tics'fi, A, At, A, in the usual manner. The

radius oi the crank motion is made proportionate to he size and capacityof tl e pneumatics so as to allow their movable members full scope orplay during infiation and deflation, thus affording the maximum of powerfor a motor of agiven size. In order to attain this maximum power with aminimum extent of valve motion, and at the same time-eliminate lateralstrain and frictional resistance in so far asis possible, I do notconnect the slide valves V directly with their respectivecrauk pitmen asheretofore, but in each case interpose between the pitman P and thewrist v, of each particular valve V a reducing lever R, and aconnectingrod S and wrist blocks 8, as will be understood more particularly byreference to 'Fig. 3." The. reducing lever R is ofthe second order beingpivoted at one end to a stationar ypart' as at r,- and pivotallyconnected at the other end to the pitman P, while intermediate betweenthese points the connection rod S is pivotally attached to said reducinglever It the point of this latterconnection being approximately in theplane of motion of the valve -V. By this means the reciprocating thrustof the valve may be materially reduced as I compared with the thrust ofthe actuating crank c, on the power shaft 0, 'while lateral'strain uponthe valve is practicallyeliminated.

General andaccurate adjustmentwitli relation to the strokeot the partsisattainedby making the pitmanP, adjustable in length, the wrist block 3,adjustable upon the connecting rod 8, and the wrist 1:, ad- I justableon the valve V. Thus the upper end p, of the pitman rod p, is threadedand adjustable within the wrist p of said pitman P; the lower end oftheconnecting rod S is threaded and adjustableivithin the wrist blocks;a1id the ste n 1*, of the wrist o, is threaded and adjustable withinthe side frame v, of the valve V. By this diversity of adjustment greatdelicacy may he'attained in setting and regulating the valve upon itsseat and with relation to the ports, atthe same.

time reducing frictional resistance by avoiding lateral strain upon thevalve, so, that it runs lightly and freely upon its seat and between thelatter and theopposed side caps or flanges b. I

What I claim as my invention and desire to secure by I Letters Patentis,

ln u pncumutlc Int-tor -of thc clmrm-ter designated. motlon transmittingmechanism interposed between a crank on the power shaft andreciprocating valve. controlling nected to the crank and to a reducinglever. said reducing lever full-ruined on u-stutlonary part, and uconnectlonrod pivotuliy connected -\vltli=the'\ 'ulve and also plvotnllyconnected with the reducing lever between the fulcrum of the latter anditspolnt of conncction with the crank pitman, for tbs-purpose dcscrlhemoaonon P. BRAND.

Witnesses i D. W. GARDNER,

Gno. War. Hum.

' porrs'to pneun utirs. consisting of u pihnun pivotnlly con-

